On Tue, Mar 22, 2016 at 9:03 AM, Kai Krakow <hurikha...@gmail.com> wrote: > Hello! > > Since one of the last kernel updates (I don't know which exactly), I'm > experiencing csum errors within VDI files when running VirtualBox. A > side effect of this is, as soon as dmesg shows these errors, commands > like "du" and "df" hang until reboot. > > I've now restored the file from backup but it happens over and over > again. > > On another machine I'm also seeing errors with big files in the > following scenario (apparently an older kernel, 4.1.x I afair): > > # ntfsclone --save /dev/md126p2 -o rescue.ntfs.img > ^ big NTFS partition ^ file on btrfs > > results in a write error and the file system goes read-only. > > Both systems have in common they are using btrfs on bcache with > compress=lzo,autodefrag,nossd,discard (mraid=1,draid=0 and > mraid=1,draid=single).
autodefrag,nossd: I am using these too on bcached btrfs, so far no issues (including kernel 4.5.0). I have been writing bigfiles (> 50G) without problems. compress=lzo: I have used it on bcached btrfs in the past, worked fine discard: I am not sure what this should do on top of /dev/bcacheX ; I don't know how this relates to the bcache discard; I currently have bcache setting: Discard? False I am not saying that the last mount option is the direct cause of the problems you experience, it is just that I don't know its impact currently. > The system mentioned first is running Kernel 4.5.0 with Gentoo > patch-set. I upgraded from the last 4.4.x kernel when I first > experienced this problem. The first time the problem resulted in a > duplicate extent which btrfsck wasn't able to fix, that's when I first > restored from backup. But now I'm getting csum errors in this file over > a over again, plus when rsync has run for backup, the system no longer > responds to "du" and "df" commands - it just hangs. > > Known problem? Does it help if I send debug info? If so, please > instruct. > > -- > Regards, > Kai > > Replies to list-only preferred. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
